Do you need a solar permit in Delaware?
By Mario Bailey Last checked
- Always required
- 1
- of 2 jurisdictions
- Conditional
- 1
- depends on size or scope
- Not required
- 0
- exempt outright
Solar Permit rules nationwide, beyond Delaware.
Requirements and size thresholds for solar permits vary by locality. The table below compares what each Delaware county or city requires. Always confirm with the local office before starting.
Comparing states? See solar permit rules across every locality we cover.
The application steps and inspection sequence for solar permits come from the model code rather than from Delaware law, so they read the same wherever you build. We keep that walkthrough in one place: how a solar permit application and its inspections work, start to finish. What changes between Delaware jurisdictions is below: who requires a permit, what they charge, and which office you file with.
Swipe sideways to see thresholds and confidence.
| Locality | Permit required? | Typical threshold | Confidence |
|---|---|---|---|
| New Castle County | Conditional | Rooftop panels on a one- or two-family dwelling are exempt from the County building permit; electrical work still goes through the State | Confirmed on official page |
| Sussex County | Yes | Any size | Confirmed on official page |
| No localities match your filter. | |||
Common questions about solar permits in Delaware
- Do I need a solar permit in Delaware?
- In Delaware it depends on the size of the job. Permits are issued locally, so the answer comes from your Delaware city or county rather than a single statewide rule. Of the 2 Delaware jurisdictions we have verified for solar work, 1 requires a permit outright, 1 depends on the size or scope of the job, and 0 require none.
- Is there a solar permit exemption in Delaware?
- 1 of the 2 Delaware jurisdictions we cover sets a threshold rather than a flat rule, so the same job can be exempt in one Delaware county and permitted in the next. The table above lists each Delaware jurisdiction's published threshold in its own words, with the source and the date we verified it.
Ready to move on your solar permit?
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
Delaware's owner-builder rule (9 Del. C. 6302(b); 9 Del. C. 4402(b); 24 Del. C. 1417; 24 Del. C. 1807(c)(2); 24 Del. C. 1820(c)(2); 16 Del. C. 7906(c)) sets what you may do on your own home without hiring anyone. Read the statute.